package iask.xiao.framework.shiro;

import java.util.ArrayList;
import java.util.List;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;

import iask.xiao.model.SysRole;
import iask.xiao.model.SysUser;
import iask.xiao.service.SysUserService;

public class MyShiroRealm extends AuthorizingRealm{

	@Autowired 
	private SysUserService sysUserService;
	
	
	/*
	 * 授权
	 * 访问控制。比如某个用户是否具有某个操作的使用权限。
	 */
	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
		 System.out.println("权限配置-->MyShiroRealm.doGetAuthorizationInfo()");
		    SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
		    SysUser userInfo  = (SysUser)principals.getPrimaryPrincipal();
		    List<SysRole> roleList = sysUserService.getRoleListByUserId(userInfo.getId().longValue());
		    for(SysRole role:roleList){
		        authorizationInfo.addRole(role.getName());
		       /* for(SysPermission p:role.getPermissions()){
		            authorizationInfo.addStringPermission(p.getPermission());
		        }*/
		    }
		    return authorizationInfo;
	}

	/*
	 * 认证
	 * 用户身份识别，通常被称为用户“登录”
	 */
	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
		 System.out.println("MyShiroRealm.doGetAuthenticationInfo()");
		    //获取用户的输入的账号.
		    String username = (String)token.getPrincipal();
		    System.out.println(token.getCredentials());
		    //通过username从数据库中查找 User对象，如果找到，没找到.
		    //实际项目中，这里可以根据实际情况做缓存，如果不做，Shiro自己也是有时间间隔机制，2分钟内不会重复执行该方法
		    SysUser userInfo = sysUserService.getSysUserByName(username);
		    //UserInfo userInfo = userInfoService.findByUsername(username);
		    System.out.println("----->>userInfo="+userInfo);
		    if(userInfo == null){
		        return null;
		    }
		    SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(
		            userInfo.getId(), //用户名
		            userInfo.getPassword(), //密码
		            ByteSource.Util.bytes(username),
		            getName()  //realm name
		    );
		    return authenticationInfo;
	}

}
